.dock {
  position: fixed;
  left: 0;
  bottom: 0;
  overflow: hidden;
  background: #fff;
  border-top: solid 1px #D0D6D9;
  width: 100%;
  height: 50px;
  display: inline-block;
  transition: transform 0.5s;
  z-index: 99;
}
.dock .active a {
  color: #DC143C;
}
.dock li {
  float: left;
  width: 33%;
  height: 50px;
  line-height: 50px;
}
.dock li a {
  display: block;
  text-align: center;
}
.main {
  padding-bottom: 50px;
}
.main .person-info {
  background-color: #122b40;
  height: 155px;
  display: block;
  overflow: hidden;
}
.main .person-info .head {
  text-align: center;
  margin: 13px;
}
.main .person-info .head img {
  width: 90px;
  height: 90px;
  border-radius: 90px;
}
.main .person-info .info h3 {
  color: #fff;
  text-align: center;
}
.main .course .course-nav ul {
  border-bottom: 1px solid #EEEEEE;
  height: 40px;
  width: 100%;
}
.main .course .course-nav ul li {
  display: block;
  float: left;
  height: 40px;
  line-height: 40px;
  width: 45%;
  text-align: center;
  color: #000;
}
.main .course .course-nav ul .selected {
  color: #DC143C;
  border-bottom: 2px solid #DC143C;
}
.main .course .course-list .course-one {
  width: 94%;
  overflow: hidden;
  padding: 3%;
  border-bottom: 1px solid #eee;
}
.main .course .course-list .course-one .thumbnail {
  width: 45%;
  display: block;
  float: left;
}
.main .course .course-list .course-one .thumbnail img {
  width: 100%;
  height: 100px;
}
.main .course .course-list .course-one .caption {
  margin-left: 10px;
  width: 47%;
  display: block;
  float: left;
}
.main .course .course-list .course-one .caption .caption-top {
  text-align: left;
  white-space: nowrap;
  height: 20px;
  text-overflow: ellipsis;
  width: 100%;
  display: block;
  float: left;
  overflow: hidden;
  padding-bottom: 10px;
}
.main .course .course-list .course-one .caption .caption-bottom {
  display: inline-block;
  float: left;
  width: 100%;
}
.main .course .course-list .course-one .caption .caption-bottom span {
  line-height: 28px;
  display: block;
  float: left;
  width: 100%;
  text-align: left;
}
.main .course .course-list .course-one .caption .red {
  color: #DC143C;
}
.study-btn {
  height: 60px;
  line-height: 60px;
  display: block;
  float: left;
  width: 46%;
  border: 1px solid #FF0000;
}
.caption-info {
  width: 50%;
  float: left;
}
